涡轮叶片不同截面换热系数计算研究

Research on Heat Transfer Coefficient at Different Sections of the Turbine Blade

随着发动机推力与耗油率指标的不断提高,尽可能降低涡轮叶片表面工作温度成为提升发动机性能的关键。通过给定的某型发动机涡轮工作叶片几何模型,建立了相应的二维计算模型,运用ANSYS系列软件进行建模、网格划分,数值模拟了跨音速工况下该型涡轮叶片沿叶高1/4处、1/2处和3/4处三个截面的流动分析以及换热系数分布和努赛尔数分布,分析了叶高变化对叶片壁面换热系数的影响。

As the engine thrust and fuel consumption indicators continue to increase,reducing the operating temperature of the turbine blade surface as much as possible becomes the key to improving engine performance.The corresponding two-dimensional calculation model is established by a given geometric model of the turbine working blade,and the ANSYS series software is used for modeling,meshing and numerical simulation of the turbine blade along the blade height under transonic conditions.The flow analysis of the three sections at 1/4,1/2 and 3/4,as well as the distribution of heat transfer coefficient and the distribution of Nusselt number is conducted,and the influence of leaf height on the heat transfer coefficient of the blade wallis analyzed.